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Critical Vulnerability with cPanel & WHM Login Authentication

None Impact Identified Ongoing April 28, 2026

Incident Lifecycle

Investigating Identified Identified

Incident Timeline

Identified
Updates are now available for these build:

11.110.0.97
11.118.0.63
11.126.0.54
11.132.0.29
11.136.0.5
11.134.0.20
WP Squared 11.136.1.7

Please run the following command to retrieve the patched version.

/scripts/upcp --force

You can confirm you are on a patched version of cPanel with the following command:

/usr/local/cpanel/cpanel -V

As long as the output matches one of the above versions, then your system has been patched.

Warning: If your server is not running a supported version o...
Apr 29, 2026 at 4:07 PM UTC
Identified
Updates are available:
TIER 11.110 WAS: 11.110.0.96 NOW: 11.110.0.97
TIER 11.118 WAS: 11.118.0.61 NOW: 11.118.0.63
TIER 11.126 WAS: 11.126.0.53 NOW: 11.126.0.54
TIER 11.132 WAS: 11.132.0.27 NOW: 11.132.0.29
TIER 11.134 WAS: 11.134.0.19 NOW: 11.134.0.20
TIER 11.136 WAS: 11.136.0.4. NOW: 11.136.0.5

Please run the following command to retrieve the patched version.

/scripts/upcp

* Webhosting Systems are being updated in stages, as they update cpanel s...
Apr 28, 2026 at 11:36 PM UTC
Investigating
All cpanel/WHM VPS and Server owners please review: https://support.cpanel.net/hc/en-us/articles/40073787579671-Critical-Vulnerability-with-cPanel-WHM-Login-Authentication

At minumum

Disable cpdavd

whmapi1 configureservice service=cpdavd enabled=0 monitored=0

Then stop cpsrvd on your server:

/scripts/restartsrv_cpsrvd --stop


Please be aware cpanel/WHM services will be offline until a patch is released.
Apr 28, 2026 at 8:45 PM UTC
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